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js binding event this points to a changed problem solution_javascript skills

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Release： 2016-05-16 17:35:40

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The function can be extended as follows

Copy the code The code is as follows:

 
Function.prototype.bind = function(obj) { 
var _this = this; 
return function() { 
_this.apply(obj,arguments); 
} 
} 

The usage is as follows

Copy code The code is as follows:

 
var a = function(){ 
 alert(this.title) 
}.bind(document); 
a(); 

is commonly used here

Copy the code The code is as follows:

 
function myalert() { 
this.title = 'hello world'; 
this.init = function() { 
$("#xxx").click(this.close.bind(this)); 
} 
this.close = function() { 
alert(this.title) 
} 
} 

Copy code The code is as follows:

var a = new myalert();

a.init();

Related labels：

this oriented Binding events

source：php.cn

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